Black Cumin (Nigella sativa)

About

What it is and where it shows up.

Whole or ground seeds of Nigella sativa L., a flowering plant native to Eastern Europe and the Middle East, used as a culinary spice and flavoring with a three-millennial history in Middle- and Far-Eastern cuisines. The seeds contain thymoquinone as the primary bioactive constituent, alongside fixed oils, alkaloids, and saponins, and are valued for both culinary and traditional medicinal applications.

Safety summary

The regulatory and scientific consensus.

At typical dietary spice-use levels, black cumin seeds are GRAS and well tolerated, with no association with clinically apparent liver injury or serum enzyme elevations. EFSA has flagged the essential oil as a 'chemical of concern' due to alkaloids such as nigellimine, though the seeds themselves are classified as a non-novel food and are broadly approved. At high supplemental doses, adverse effects such as bloating, nausea, and burning sensation have been reported; rare severe skin reactions (erythema multiforme) have occurred with topical essential oil use.

Regulatory landscape

What food-safety regulators have decided.

Jurisdiction	Status	Note
EFSA (European Food Safety Authority) (European Union)	Approved	In 2021, EFSA classified black cumin seeds as a non-novel food, exempt from Novel Food Regulation (EU) 2015/2283, as they were consumed to a significant degree before 15 May 1997. However, EFSA separately considers the black cumin essential oil a 'chemical of concern' due to the presence of certain alkaloids (e.g., nigellimine); this concern does not apply to the seeds used as a spice.source
FSSAI (Food Safety and Standards Authority of India) (India)	Approved	Kalonji (Nigella sativa) is recognized as a permitted spice under FSSAI Food Safety and Standards regulations and covered under FSSAI spice quality and safety standards guidance (October 2018).source
FDA (Food and Drug Administration) (United States)	Approved	Nigella sativa seeds are Generally Recognized As Safe (GRAS) by the FDA and the Flavor and Extract Manufacturers Association (FEMA) for use as a food ingredient and flavoring at historically practiced levels of consumption.source

Who should approach with care

Whose guidance would steer them away.

Pregnancy — Nigella sativa has documented antiangiogenic and abortifacient effects; ethnobotanical evidence, animal studies, and a clinical trial confirm risk of abortion induction, reduced litter size, and extended gestation, and its use during pregnancy at supplemental doses is considered prohibited.

Diabetes — Nigella sativa oil exerts hypoglycemic activity via extrapancreatic mechanisms and may produce additive blood-glucose-lowering effects when combined with antidiabetic medications, increasing the risk of hypoglycemia.

Other — Thymoquinone has demonstrated in vitro anticoagulant activity—prolonging thrombin time, prothrombin time, and aPTT—so individuals on anticoagulant or antiplatelet therapy should exercise caution at supplemental (above-spice-level) doses.

Research citations

The sources behind this verdict.

1PubMed. The Use of Nigella sativa in Cardiometabolic Diseases, 2024. pmc.ncbi.nlm.nih.gov
2PubMed. Evaluation of the effect of Nigella sativa oil on the outcome of missed abortion in women: A randomized double-blind clinical trial, 2024. pmc.ncbi.nlm.nih.gov
3PubMed. Nigella sativa (black seed) safety: an overview, 2023. pubmed.ncbi.nlm.nih.gov
4other. Black Cumin Seed – LiverTox (NCBI Bookshelf), 2023. ncbi.nlm.nih.gov
5PubMed. Black Cumin (Nigella sativa L.): A Comprehensive Review on Phytochemistry, Health Benefits, Molecular Pharmacology, and Safety, 2021. pubmed.ncbi.nlm.nih.gov
6PubMed. Assessment of black cumin (Nigella sativa L.) as a food ingredient and putative therapeutic agent, 2021. pubmed.ncbi.nlm.nih.gov

Independently researched6 citations